v0.1.7

xpcsjax v0.1.7

NLSQ floor raised to nlsq>=0.7.6 across every pin site (pyproject.toml,
.pre-commit-config.yaml, the runtime dependency check, both conda
recipes, and the docs that quote it). conda-recipe/nlsq updated to the
0.7.6 sdist; upstream changed neither the dependency set nor the
entry points, so the recipe's run deps are unchanged.

make verify now reports zero warnings (was 10): three non-actionable
upstream nlsq warnings are filtered at the narrowest honest scope.

Verified: make verify (2670 passed), strict sphinx-build -W, and
make verify-nlsq all clean at 0.1.7.